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Honda Odyssey 2004. Manual - part 41

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6-4

Cylinder Head

Component Location Index (cont’d)

WASHER

RUBBER SEAL

OIL CONTROL ORIFICE

CYLINDER HEAD BOLT

CYLINDER HEAD
COVER

HEAD COVER GASKET

CYLINDER HEAD GASKET

DOWEL PINS

OIL CONTROL ORIFICE

O-RING

CYLINDER HEAD
GASKET

CYLINDER
HEAD

O-RING

Removal,page 6-34
Installation,

page 6-34

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6-5

CAMSHAFT THRUST COVER

ROCKER ARM ASSEMBLIES

CAMSHAFT

VALVE KEEPERS

SPRING RETAINER

EXHAUST VALVE
SPRING

EXHAUST VALVE
SEAL

VALVE SPRING
SEAT

EXHAUST VALVE
GUIDE

CYLINDER HEAD

OIL SEAL

EXHAUST VALVE

DOWEL PIN

GASKET

INJECTOR BASE

INTAKE VALVE
GUIDE

VALVE SPRING SEAT

INTAKE VALVE SEAL

INTAKE VALVE SPRING

SPRING RETAINER

VALVE KEEPERS

O-RING

INTAKE VALVE

LOST MOTION
ASSEMBLY

HOLLOW DOWEL
PINS (FRONT BANK)
SOLID DOWEL
PINS (REAR BANK)

HOLLOW DOWEL
PINS (REAR BANK)

SOLID DOWEL
PINS (FRONT BANK)

Removal, page 6-38
Inspection, page 6-41

Inspection, page 6-43

Inspection, page 6-48
Replacement, page 6-49

Removal, page 6-35
Warpage, page 6-38
Valve seat reconditioning,

page 6-51

Installation, page 6-55

Removal, page 6-46
Inspection, page 6-47
Installation, page 6-53

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DTC P1259:

Special Tools Required

YES

6-6

Cylinder Head

DTC Troubleshooting

VTEC OIL PRESSURE SWITCH
2P CONNECTOR

VTM
(BLU/BLK)

VTEC OIL PRESSURE SWITCH HARNESS
2P CONNECTOR

A problem in the VTEC Oil

Pressure Switch circuit or VTEC Solenoid
Valve circuit

• Pressure gauge adapter 07NAJ-P07010A
• A/T low pressure gauge w/panel 07406-0070300
• A/T pressure hose, 2,210 mm 07MAJ-PY4011A
• A/T pressure adapter 07MAJ-PY40120

1. Do the powertrain control module (PCM) reset

procedure (see page 11-4).

2. Start the engine.

3. Warm up the engine to normal operating

temperature (cooling fan comes on).

4. Road test the vehicle:

Accelerate in 1st gear to an engine speed over
4,000 rpm. Hold that engine speed for at least
2 seconds. If DTC P1259 is not repeated during the
first road test, repeat this test two more times.

Go to step 5.

Intermittent failure, system is OK at this time.

Check for poor connections or loose wires at the
VTEC solenoid valve and PCM.

5. Turn the ignition switch OFF.

6. Disconnect the VTEC oil pressure switch 2P

connector.

7. Check for continuity on the VTEC oil pressure

switch between the pressure switch 2P connector
terminals No. 1 and No. 2.

Go to step 8.

Replace the VTEC oil pressure switch.

8. Turn the ignition switch ON (II).

9. Measure the voltage between the VTEC oil

pressure switch harness 2P connector No. 1
terminal and body ground.

Go to step 10.

Inspect for an open or short to ground in the

wire between the VTEC oil pressure switch and the
PCM connector terminal C10 (1999-2000, 2002-2004
models) or A20 (2001 model). If the wire is OK,
substitute a known-good PCM and recheck (see
page 11-5).

Terminal side of male
terminals

Wire side of female
terminals

Is DT C P1259 indicated?

Is ther e continuity?

Is ther e batter y voltage?

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YES

6-7

VTEC OIL PRESSURE SWITCH HARNESS
2P CONNECTOR

VTEC SOLENOID VALVE
1P CONNECTOR

07NAJ-P07010A

07406-0070300

07MAJ-PY40120

10. Measure voltage across the VTEC oil pressure

switch harness 2P connector.

Go to step 11.

Repair open in the wire between the VTEC oil

pressure switch and G101.

11. Turn the ignition switch OFF.

12. Disconnect the VTEC solenoid valve 1P connector.

13. Check for continuity on the VTEC solenoid valve

between the solenoid valve 1P connector terminal
and body ground.

Go to step 14.

Replace the VTEC solenoid valve.

14. Remove the VTEC oil pressure switch (A). Install

the special tools as shown, then reinstall the VTEC
oil pressure switch.

15. Reconnect the VTEC solenoid valve 1P connector

and VTEC oil pressure switch 2P connector.

16. Connect a tachometer.

17. Warm up the engine to normal operating

temperature (cooling fan comes on).

18. Check oil pressure at engine speeds of 1,000, 2,000

and 3,000 rpm. Keep measuring time as short as
possible because the engine is running with no
load (less than 1 minute).

Go to step 19.

19. Turn the ignition switch OFF.

20. Disconnect the VTEC solenoid valve 1P connector.

21. Attach the battery positive terminal to the VTEC

solenoid valve terminal.

22. Start the engine and check oil pressure at an engine

speed of 3,000 rpm.

Go to step 23.

Inspect the VTEC solenoid valve (see page

(cont’d)

Wire side of female terminals

Terminal side of male terminal

Is ther e batter y voltage?

Is ther e 14

Is pr essur e below 49 kPa ( 0.5 kgf / cm , 7 psi)?

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6-10).

Inspect the VTEC solenoid valve (see page

Is pr essur e above 390 kPa ( 4.0 kgf / cm , 57 psi)?

6-10).

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